Aistulf

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cession to Papal States

...claim of the Byzantine Empire to sovereignty there. This Donation of Pippin (756) provided the basis for the papal claim to temporal power. In the same year, by the Treaty of Pavia, the Lombard king
Aistulf ceded territory in northern and central Italy. It was probably also about this time that the Donation of Constantine was forged by an unknown cleric in Rome. A legitimate donation by...

opposition to Pippin III

The pope was in need of aid.
Aistulf, king of the Lombards, had seized Ravenna with its lands, known as the exarchate. Soon, Lombard troops marched south, surrounded Rome, and prepared to lay siege to its walls. So matters stood when in 752 Zacharias died and Stephen II became pope. In November 753 Pope Stephen made his way over the stormy mountain passes to Frankish territory. He remained in...

relations with Stephen II

...previous day without being consecrated). The central act of his pontificate was to free the papacy from Byzantium and to ally it with the Franks against the Lombards, who, under the Lombardic king
Aistulf, were threatening Rome and attempting to conquer all of Italy.

role in

Italian history

Aistulf (749–756) followed Liutprand’s policies to their logical conclusion: he conquered Ravenna in 751, ending the exarchate; he ruled in Spoleto without a duke from 751 to 756; and in 752 he began to move on Rome, demanding tribute from the pope. But times had changed for the Lombards. In the 740s the popes had become close to the rising Carolingian dynasty in Francia, and in 751 its...